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Date:   Thu, 22 Jul 2021 16:23:52 +0200
From:   Eric Dumazet <>
To:     Boris Pismenny <>
Cc:     David Ahern <>, Jakub Kicinski <>,
        David Miller <>,
        Saeed Mahameed <>,
        Christoph Hellwig <>,,,, Al Viro <>,,,, netdev <>,,,
Subject: Re: [PATCH v5 net-next 24/36] net: Add MSG_DDP_CRC flag

On Thu, Jul 22, 2021 at 1:06 PM Boris Pismenny <> wrote:
> From: Yoray Zack <>
> if the msg sent with this flag, turn up skb->ddp_crc bit.
> Signed-off-by: Yoray Zack <>

Ok, but why ?

How would you document in linux manpages the purpose of this flag ?

How can applications be sure the kernel they run on is actually
supporting this flag ?
Maybe it is a hint only ?

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